R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 123VU AVNCS VENT/EXTC/FAN 2HQ AE02
 **ON A/C ALL
 123VU AVNCS VENT/BLOWER/FAN 1HQ AD10
 **ON A/C 301-399,
 123VU AVNCS VENT/EXTC/FAN 2HQ AC04
 **ON A/C ALL
 Subtask 21-26-55-860-054
 C. Aircraft Maintenance Configuration
 (1)
 Make sure that the throttle control levers of the engines 1 and 2 are at idle.

 (2)
 On the VENTILATION section of the overhead control and indicating panel 22VU:

 -make sure that the BLOWER and EXTRACT pushbutton switches are in the AUTO configuration (pushed with the FAULT and OVRD legends off).

 (3)
 Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. TASK 31-60-00-860-001).

 Subtask 21-26-55-010-054
 D. Get Access
 (1)
 Put the access platform in position at the access door 812.

 (2)
 Open the access door 812.

 4. Procedure
_________ Subtask 21-26-55-710-053
 A. Operational Test of the Skin-Exchanger Outlet Bypass-Valve (23HQ)
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1.
 On the rear circuit breaker panel 122VU: - open the circuit breaker 3HQ.

2.
 On the rear circuit breaker panel 122VU:

-close the circuit breaker 3HQ.
On the VENTILATION section of theoverhead control and indicating panel22VU:
 -
the FAULT legends of the BLOWER and

 EXTRACT pushbutton switches come on. On the upper ECAM DU:

 -
the AVNCS SYS FAULT indication comes into view.

On the VENTILATION section of theoverhead control and indicating panel22VU:

 -
the FAULT legends of the BLOWER and EXTRACT pushbutton switches go off. On the upper ECAM DU:

 -
the AVNCS SYS FAULT indication goes

 out of view. In the avionics compartment:
 -make sure that the skin-exchanger outlet bypass-valve 23HQ opens and closes during the automatic test (t = 60 seconds) (look at the position indicator on the valve).
 1EFF : ALL 1 21-26-55Page 503 1 1 May 01/04R 1 1 1CES 1

 5. Close-up
________ Subtask 21-26-55-410-055
 A. Close Access
 (1) Close the access door 812.
 (2) Remove the access platform(s). Subtask 21-26-55-860-055
 B. Do the EIS stop procedure
 (Ref. TASK 31-60-00-860-002).

 Subtask 21-26-55-862-056
 C. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
 1EFF : ALL 1 21-26-55Page 504 1 1 May 01/04R 1 1 1CES 1

 CHECK VALVE - AIR INLET (2150HM) - REMOVAL/INSTALLATION
_______________________________________________________
 TASK 21-26-56-000-001
 Removal of the Air Inlet Check Valve (2150HM)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE  QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific blanking plugs No specific circuit breaker(s) safety clip(s) R No specific access platform 1 m (3 ft. 3 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
24-42-00-861-001  Energize the Ground Service Network from the External Power 21-26-56-991-001 Fig. 401
 3. Job Set-up
__________
 CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE

_______ THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
 Subtask 21-26-56-861-050
 A. Energize the ground service network (Ref. TASK 24-42-00-861-001).

 Subtask 21-26-56-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05 122VU AIR COND/AVNCS/VENT/MONG 3HQ Y17
　
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